@hazelnoot @snarfed.org @snarfed Bluesky and Nostr are the fediverse (or rather, Bluesky will be once they choose to federate, which this bridge is just preparing for), it's not my fault you didn't know the difference.
One of the key elements of the fediverse is you don't get to control what platform others use to view and access your account. There's no "block firefish" or "block hubzilla" or "block mastodon". A bridge is just another extension of that and long before ActivityPub even existed bridges were already established as a major feature of federated networks (hell, I reference an XMMP-Matrix bridge in my bio, all of which predate Activity-Pub and that bridge can only be opted out of by blocking the server... like most bridges).
Basically, this is the way the system was always supposed to work, I'm sorry that you were mislead to think otherwise.
And I guarantee you W3C (the actual stewards of ActivityPub) were absolutely expecting bridges like this to show up immediately (bridges to diaspora* and OStatus would have been some of the first bridges on ActivityPub, again operating silently with no opt-in or opt-out mechanism).